1111 1111 1111 0000 =2^15+2^14+2^13+2^12+2^11+2^11+2^10+2^9+2^8+2^7+2^6+2^5+2^4 =32768+16384+8192+4096+2048+1024+512+256+128+64+32+16 =65520D
